2,4,6-substituted-3,5-dioxo-1,2,4,6-thiatriazines

ABSTRACT

WHEREIN R, R1 and R2 are independently hydrogen; aliphatic or cycloaliphatic hydrocarbyl of 1 to 10 carbon atoms optionally substituted with halogen atoms; aryl of 6 to 15 carbon atoms optionally substituted with halogen atoms, nitro groups, alkyl groups, alkoxy groups or trifluoromethyl; or a heterocyclic group of 1 hetero oxygen, sulfur or nitrogen atoms and 4 to 5 annular carbon atoms and a total of 4 to 8 carbon atoms; find use as herbicides.   Compounds of the formula

United States, Patent n91 Franke 2,4,6-SUBSTlTUTED-3,S-DIOXO-l,2,4,6-

THIATRIAZINES [75] Inventor: Hans G. Franke, Walnut Creek,

, Calif.

[73] I Assignee: Chevron Research Company, San

' Francisco, Calif.

[22] Filed: May 24, 1 971 [2]] Appl. No.1 146,498

[52] US. Cl. 260/243 R, 71/90 [51] Int. Cl C07d-93/00 [58] Field of Search 260/243 R 56] References Cited UNITED STATES PATENTS 3,681,327 8/1972 Newman.. 260/243 Primary Examiner-John Ford C toner, Jr.; Raymond Owyang June 18, 1974 [57] ABSTRACT Compounds of the formula l N o oo=o l nular carbon atoms and a total of 4 to .8 carbon atoms;

find use as herbicides.

18 Claims, No Drawings BACKGROUND OF THE INVENTION 1. Field m The present invention is directed to 2,4,6- substituted-3,5-dioxol ,2,4,6-thiatriazine.s, particularly 2-aryl-3 ,5 -dioxo-4,6-substitutedl ,2,4,6-thiatriazines and their use as herbicides.

2. Prior Art US. Pat. No. 3,435,031 discloses certain 3,5- dioxotetrahydro-l ,2,4,6-thiatriazinel l-dioxides and their use as bactericides, fungicides, etc.

DESCRIPTION OF THE INVENTION The counpounds of the present invention can'be represented by the formula wherein R, R and R are individually hydrogen; aliphatic hydrocarbyl group of l to 10 carbon atoms substituted with to 4 halogen atoms of atomic number 9 to 35 (fluorine, chlorine or bromine); cycloaliphatic hydrocarbyl group of 3 to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35; aryl of 6 to 15 carbon atoms substituted with 0 to halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of l to 4 carbon atoms, alkoxy groups of l to 4 carbon atoms or 0 to l trifluoromethyl; or a heterocyclic group of l hetero oxygen, sulfur or nitrogen and 4 to 5 annular carbon atoms and a total of 4 to 8 carbon atoms.

Preferably one or two of R, R and R are aryl of 6 to 15 carbon atoms substituted with 0 to 5 halogen atoms of atomic number 9 to 35. nitro groups, alkyl groups of l to 4 carbon atoms or alkoxy groups of l to 4 carbon atoms or 0 to l trifluoromethyl and the other(s) of R, R and R is hydrogen, aliphatic hydrocarbyl groups of l to l0 carbon atoms substituted with O to 4 halogen atoms of atomic number 9 to 35 or cy- I cloaliphatic hydrocarbyl group of 3 to l0 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35.

Still more preferably, R and R individually are hydrogen or aliphatic hydrocarbyl of l to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 and R is aryl of 6 to carbon atoms substituted with 0 to 5 halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of l to 4 carbon atoms or alkoxy groups of l to 4 carbon atoms or O to I trifluoromethyl.

The aliphatic hydrocarbyl groups which R, R and R may represent are alkyl of l to 10 carbon atoms, alkenyl of 2 to It) carbon atoms or alkynyl of 2 to 10 carbon atoms, said alkyl. alkenyl or alkynyl being optionally substituted with up to 4 halogen atoms of atomic number 9 to 35 Preferably the aliphatic hydrocarbyl group will only contain up to 6 carbon atoms. Furthermore, it is preferred that the aliphatic hydrocarbyl group be alkyl or alkenyl or haloalkyl or haloalkenyl.

The cycloaliphatic hydrocarbyl groups which R, R and R may represent include cycloalkyl and cycloalke- 2 nyl, said cycloalkyl or cycloalkenyl being optionally substituted with up to 4 halogen atoms of atomic number 9 to 35. Preferably, the cycloaliphatic hydrocarbyl group will contain 3 to 6 carbon atoms, and more preferably be cycloalkyl.

The aryl groups which R, R and R can represent are preferably of 6 to 15 carbon atoms substituted with 0 to 5 halogen atoms of atomic number 9 to 35, preferably fluorine or chlorine, 0 to 2 nitro groups or 0 to 3 alkyl groups of 1 to 4 carbon atoms or 0 to 3 alkoxy groups of l to 4 carbon atoms. Preferably the number of substituents on the aryl groups will not exceed 3 and preferably not exceed 2. The aryl group is preferably phenyl substituted with 0 to 5 halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of l to 4 carbon atoms or alkoxy groups of V1 to 4 carbon atoms. Even more preferably, the aryl is phenyl substituted with 0 to 2 halogen atoms of atomic number 9 to 35, preferably fluorine or chlorine, to l aklyl group of l to 4 carbon atoms, preferably methyl, or O to 1 alkoxy group of l to 4 carbon atoms, preferably methoxy.

It is preferred that R is alkyl of l to 6 carbon atoms, preferably 1 to 4 carbon atoms substituted with 0 to 3 halogen atoms of atomic number 9 to 35. Still more preferably, R will be unsubstituted alkyl of l to 4 carbon atoms, preferably 1 to 3 carbon atoms.

R is preferably hydrogen or alkyl of l to 4 carbon atoms substituted with O to 3 halogen atoms of atomic number 9 to 35 More preferably, R is hydrogen or unsubstituted alkyl of l to 4 carbon atoms, preferably methyl.

The most preferred compound is the one in which R and R are methyl and R is 2-fluorophenyl.

Representative aliphatic hydrocarbyl groups which R, R and R can represent include methyl, ethyl, n-

propyl, isopropyl, n-butyl, sec.butyl, isobutyl, t.butyl, pentyl, hexyl, octyl, nonyl, decyl, vinyl, allyl, crotyl, 4- pentenyl, 3-he xenyl, 4-decenyl, propargyl, chloromethyl, dichloromethyl, trichloromethyl, fluoromethyl, tetrachloroethyl, l-chloroethyl, 1,2-dichloroethyl, 2,2- dibromopropyl, 1,2,6-trichlorohexyl, trichlorovinyl, etc.

Representative cycloaliphatic groups which R, R and R can represent include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclooctyl, cyclodecyl, cyclopropenyl, cyclobutenyl, cyclopentenyl, cycloheptenyl, cyclooctenyl, cyclodecenyl, chlorocyclopropyl, bromocyclohexyl, fluorocyclohexyl, chlorocyclooctenyl, etc.

Representative heterocyclic groups which R, R and R can represent include Z-pyridyl, 3-lutidyl, 2- pyrrolyl, 2-thienyl, Z-furfuryl, 2-furylvinyl, 3-tetrahydrofurfuryl.

Representative aryl groups which R, R and R can represent include phenyl, 2-chlorophenyl, 3- chlorophenyl, 4-chlorophenyl, 2,3-dichlorophenyl, 2,4- dichlorophenyl, 2,5-dichlorophenyl, 2-fluorophenyl, 3-fluorophenyl, 4-fluorophenyl, 2-bromophenyl, 2,4- dibromophenyl, 4-bromophenyl, 2-chloro-4- bromophenyl, 4-methoxyphenyl, 2-ethoxyphenyl, 2- methylphenyl, 4-isopropylphenyl, 2,4-dimethylphenyl, 4'nitrophenyl, 2-nitro-4'methylphenyl, 3- sec.butylphenyl, naphthyl, Z-methyI-l-naphthyl, 2-trifluoromethylphenyl, 3-trifluoromethylphenyl, 3- chloro-4bromophenyl.

Representative compounds of the present invention include 3 ,5-dioxo-l ,2,4,6-thiatriazine, 2,4,6-trimethyl- 3 3,5-dioxo-l ,2,4,6-thiatriazine, 2,4-dimethyl-3,5-dioxo- 6-ethyl-l ,2,4,6-thiatriazine, 2-methyl-3,5-dioxo-4- ethyl-orn-propyl-l ,2,4,6-thiatriazinc, 2,4,6-trivinyl-3,5- dioxol ,2,4,6-thiatriazine, 2-allyl-3,5-dioxo- I ,2,4,6- thiatriazinc, 2-propargyl-3,5-dioxo-6-ethyl-l ,2,4,6- thiatriazinc, 2-cyclohexyl-3,5-dioxo-4-methyl 1 2,4,6- thiatriazinc, 3.5-dioxo-4,6-di-( n-decyl )-1 ,2,4,6- thiatriazine, 2-mcthyl-.3,5-dioxo-4-propargyl -6-allyll ,2,4,6-thiatriazine, 2-fluoromethyl-3,5-dioxo-4- chloromethyll ,2,4,6-thiatriazine, 2,4-di'methyl-3,5- dioxo-6-( 2-chloropropyl l ,2,4,6-thiatriazine, 2-( 2- pyridyl)-3,5-dioxo-l,2,4,6-thiatriazine, 2-methyl-3,5- dioxo-4-( Z-thienyl )-6-ethyl-l ,2,4,6-thiatriazine, 3,5- dioxo-4-( 2-furfuryl )-6-propargyll ,2,4,6-ethyl- 1 2,4,6-

thiatriazine, 3 ,5-dioxo-4-( 2-furfuryl )-6-propargyll,2,4,6-thiatriazine, 2,4,6-trivinyl-3,5-dioxo-1,2, 1,6- thiatriazine, 2-( 2-fluorophenyl )-3,5-dioxo-4,6-

diphenyl-l ,2,4,6-thiatriazine, 2-( 2-pyrrolyl )-3,5-dioxo- 4-( 2,4,6-trichlorophenyl )-6-methyl-l ,2,4,6- thiatriazine, etc.

Representative compounds of the present invention having one aryl group include the following: 2-(2- fluorophenyl )-3 ,5-dioxo-4,-dimethyl- 1 ,2,4,6- thiatriazine, 2-(2-chlorophenyl)-3,5-dioxo-4,6-diethyll,2,4,6-thiatriazine, 2-(2-bromophenyl)-3,5-dioxo-4- methyl-6-isopropyl-l ,2,4,6-thiatriazine, 2-( 2-chloro-4- bromophenyl )-3,5-dioxo-6-n-butyl-l ,2,4,6- thiatriazine, 2-(2-ethylphenyl)-3,5-dioxo-4-isopropyl- 6-allyl-l ,2,4,6-thiatriazine, 2-(4-isopropoxyphenyl)- 3,5-dioxo-4,6-di-n-propyll ,2,4,6-thiatriazine, 2-(2,4- dimethylphenyl)-3,5-dioxo-4,6-dimethyl-l,2,4,6- thiatriazine, 2-( 2-methyl-4-bromophenyl )-3,5-dioxo-4- isopropyl--methyll ,2,4,6-thiatriazine, 2-( 2- naphthyl )-3,5-dioxo-4,6-dimethyll ,2,4,6-thiatriazine, 2-( 4-fluorophenyl )-3,5-dioxo-4-methyl-l ,2,4,6- thiatriazine, 2-( 3-methoxy-4-bromophenyl )-3,5-dioxo- 4-propargyl-6-n-hexyl4 ,2,4,6-thiatriazine, 2-( 2- chloro-4-bromophenyl )-3,5-dioxol ,2,4,6-thiatriazine, 2-( 2-methoxy-4-ethylphenyl )-3,5-dioxo-4-( 3-butenyl o-chloromethyl-l .2,4,6-thiatriazine, 2-phenyl-3,5- dioxo-4-dichloromethyl-6-( l, l ,2-trifluorethyl)- l,2,4,6-thiatriazine, 2-(3-chloro-4-bromophenyl)- 3,5- dioxo-4,6-dimethyl-l ,2,4,6-thiatriazine, H 2-(- trifluoromethylphenyl)3 ,5-dioxo-4,6-dimethyll,2,4,6-thiatriazine, etc.

3.5-dioxo-4-methyll ,2.4,6-thiatriazine, 2-( 2- fluorophenyl )-3.5-dioxo-4-methyl-6-( 3- methylphenyl l ,2.4,6-thiatriazine. 2-(4- chlorophenyl )-3,5-dioxo-4-methyl-6-( 3- methylphenyl)-1.2.4.6-thiatriazine. 2-( 2- trifluoromethylphenyl )-3,5-dioxo-6-( 3-chloro-4- bromophenyl l ,2.4,6-thiatriazine, 2-( 4-nitrophenyl 3.5-dioxo-6-(4-chlorophenyl l .2,4,6-thiatriazine. 2- (4-methoxyphenyl )-3.5-dioxo-4-methyl-6-( 3,4- dichlorophenyl l .2,4,6-thiatriazine. 2-(2,4-

2,6-di-(3-methylphenyl) 4 dimethylphenyl)-3,5-di0xo-4 ethy]-6-(2- fluorophenyl)-l ,2,4,6-thiatriazine, 2-( l-naphthyl)-3,5- di0xo-6-(3,5-dichlorophenyl)-l ,2,4,6-thiatriazine, 2,4- di-( 2-fluorophenyl)-3,5-dioxo-6-methyl- 1 ,2,4,6- thiatriazine, 2,4-di-( 4-chlorophenyl-3,S-dioxo- 1 ,2,4,6- thiatriazine, 2,4-di-( 3-chloro-4-bromophenyl )-3 ,5- dioxo-odsopropyll ,2,4,6-thiatriazine, 2-( 2- fluorophenyl )-3 ,5-dioxo-4-( 4-chlorophenyl )-6-methyll,2,4,6-thiatriazine, 2-( 3-methylphenyl )-3,5-dio xo-4- (2 fluorophenyl)-6-allyl-l ,2,4,6-thiatriazine, 2-(2- fluorophenyl)-3,5-dioxo-4-(3-trifluoromethylphenyl)- l ,2,4,6-thiatriazine, 2-( 3,4-dichlorophenyl)-3,5-dioxo- 4-(4-isopropoxyphenyl)-6-methyl-1 ,2,4,6-thiatriazine, -methyl-l ,2,4,62-( 3-chloro-4-bromophenyl )-3 ,5- dioxo-4-( 3-methylphenyl )-6-butenyl-l ,2,4,6- thiatriazine, 2-methyl-3,5-dioxo-4,5-di-( 2- fluorophenyl l ,2,4,6-thiatriazine, 2-isopropyl-3 ,5- dioxo-4-( 3,4-dichlorophenyl )-6-phenyl- 1 ,2,4,6- thiatriazine, 2-ethyl-3 ,5-dioxo-4-( 3-bromo-4- chlorophenyl )-6-( 2-chlorophenyl l ,2,4,6-thiatriazine, 2-butyl-3 ,5-dioxo-4-( 3-trifluoromethylphenyl )-6- (2,4,6-trichlorophenyl) 1,2,4,6-thiatriazine, etc.

The compounds of this invention are prepared by the reaction of sulfur dichloride with an appropriate biurettype compound, as follows:

wherein R, R and R are as defined previously.

In this reaction (I) sulfur dichloride, preferably dissolved in a solvent is added to the biuret, preferably dissolved in the same solvent. Sulfur dichloride is used in at least an equimolar amount or sometimes in a molar excess, up to about 20 percent based on the biuret. A solvent soluble base is also present in the reaction to react with or tie-up the hydrogen chloride by-product. For this purpose the organic tertiary amines are preferred, e.g., pyridine, triethylamine, quinuclidine, N- methylpiperidine and the like. The solvents useful for this reaction are the inert halogenated hydrocarbons such as chloroform, carbon tetrachloride, dichloromethane, perchloroethylene, chlorobenzene, etc. Dichloromethane is preferred. The reaction is exothermic, and the temperature is usually maintained within the range of 0 to 40C., preferably 10 to 20C. Temperature control is accomplished by controlling the rate of addition of sulfur dichloride, by direct cooling or by reflux cooling. After all the reactants are added, the resulting mixture is stirred preferably at about 20C. for /2 to 24 hours, preferably 1 or 2 hours. This reaction is usually carried out at atmospheric pressure, although higher or lower pressures may be used with appropriate equipment.

The product is isolated from the reaction mixture of reaction (I) by first washing with water to remove the amine hydrochloride salt. After drying, the organic solvent is removed by vaporization, usually by distillation or evaporation. The crude product obtained in this way may be used as such or it may be purified by distillation, crystallization or chromatography. The latter method is preferred.

For this reaction (I), freshly distilled sulfur dichloride is preferred. After standing for some time, sulfur dichloride equilibrate s formation of sulfur monochloride. Commercial sulfur dichloride is essentially an equilibrium mixture. When this mixture is used in the above reaction, many by-products are obtained and the yield'of the desired 1,2,4,6-thiatriazine is very small.

The biuret-type compounds used as a feed stock in the above reaction (1) are obtained by the reaction of an appropriate isocyanate with an appropriate urea as follows:

wherein R, R and R are as defined previously. This reaction (11) is well known as is further described in US. Pat. No. 3,189,431.

Certain symmetrical compounds of this invention are made from symmetrical biurets which in turn may be obtained by the reaction of 2 moles of an appropriate carbamoyl chloride and a primary amine, as follows:

EXAMPLE 1(A) Preparation of l .3-dimethyl-5-( 2-fluorophenyl biuret To a solution of 8.8 g. (0.1 mole) of 1,3-dimethyl urea dissolved in 30 ml. of xylene there was added a solution of 13.7 g. (0.1 mole) of 2- fiuorophenylisocyanate dissolved in 30 ml. of xylene. The resulting mixture was refluxed for 4 hours and then allowed to stand at ambient temperature for 16 hours. During this time the product crystallized and was removed by filtration. The product weighed 15.8 g. The NMR spectra had a doublet at 2.86 ppm. a singlet at 3.25 ppm, and a multiplet structure at 7.2 ppm, characteristic of a biuret structure.

EXAMPLE 1(B) Preparation of 2-(2-fluorophenyl)-3,5-dioxo-4,6- dimethyl-1,2,4,6-thiatriazine The product of Example 1(a), 15.0 g. (0.067 mole) insoluble portion, about 2 g., was removed by filtration. v

The filtrate was then evaporated to give 13 g. of an oil which was chromatographed on silica gel, using hexane, ether/hexane, and ether as the successive eluents. The ether portions contained 9.6 g. of product which was oily in form. Analysis showed calculated S, 12.5%. Found: S, 12.3%. The NMR spectra had a singlet at 3.2 ppm, a singlet at 3.25 ppm and a multiplet structure at 7.2 ppm, consistent with the assigned structure. The infrared spectra had strong adsorption peaks at 730,

Other compounds were made by similar reactions. These are listed in Table I, attached.

TABLET Elemental Analysis (percent) Melting Compound Calc. Found Calc. Found Point C.

2-(4-chlorophenyl)-3,5-dioxo-4.6-dimethyl-1.2.4.6- 13.0 13.9 1 1.8 1 1.9 Oil thiatriazine 2-phenyl-3.5-dioxo-4.6-dimethyl-1.2.4.6- 13.5 13.2 Oil thiatrizaine Z-(3-methylpheny0-3 .5-dioxo-4.6-dimethyl-1.2.4.6 12.8 12.4 Oil thiatrizaine I 2-(3,4-dichlorophenyll-3.5-dioxo-4.6-dimethyl- 23.2 22.6 10.5 10.2 1 18 121 1.2 .4.6-thiatriazine 2-(4methoxyphenyl)-3 .5-dioxo-4.6-methyl-1.2.4.6- 12.0 1 1.8 96.5-98.

thiatriazine 2-(2-flu0rophenyU-3.5-dioxo-6-methyl-1,2.4,6- 7.1 *7.2 1 1.9 12.1 21021 1 thiatriazine 11.3 11.0 Semi Solid *Fluorine analysis.

7 UTl LITY was 5000 ppm. This formulation was uniformly sprayed on 2 replicate pots of 24-day-old plants (approximately l5 to 25 plants per pot) at a dose of 100 mg. per cm After the plants had dried. they were placed in agreenhouse and then watered intermittently at their bases as needed. The plants wereobserved periodically for phytotoxic effects and physiological and morphological responses to the treatment. After 3 weeks the herbicidal effectiveness of the thiatriazine was rated based on these observations. A O to [00 scale was used; 0 representing no phytotoxicity, lOO representing complete kill.

The results of these tests appear in Table ll.

TABLE ll Herbicidal Effectiveness Pre/Post Compound 0 W C M P L 2-(Z-fluorophcnyl)3-.5-dioxo-4.6- 100/100 100/100 100/100 100/100 1001100 100/1'00 dimcthyl-l .2.4.6-thiatriazinc 2-(4-chlorophcnyl)-3.5-dioxo-4,6 80/l0 40/35 85/ 80/l00 95/95 85/l00 dimethyll .2.4.6-thiatriazine 1 2-phcnyl-3.5-dioxo-4.6-dimethyl- .lOO/lOO l00/l00 l00/l00 95/l00 90/100 95/l00 1.2.4.6-thiatriazinc v 2-)J-methylphenyl)-3.4-dioxo-4,6- IOU/60 lOO/IOO lOO/SO IOO/IOO 100/60 l00/95 dimcthyl' l .2.4.6-thiatriazinc 2-( 3.4-dichlorophcnyl)-3.5-dioxo-4.6- 20/- 60/45 /0 l 0/ l 00 /35 l0/70 dimethyll .2.4.6-thiatriazine 2-(4-methoxyphcnyl)-3.5-dioxo-4.6- 35/l0 50/45 20/ 70/50 40/35 /80 dimethyl-l.2,4.6-thiatriazine Z-(Z-fluorophcnyl)-3.5-dioxo-6-methyl- 50/ l5/ 45/- /20 /40 /25 l,2.4,6-thiatriazine 2-(2-fluorophenyl)-3,5-dioxo4-methyl- 20/45 40/90 45/74 l00/95 55/95 80/100 6-is0pr0pyl-l ,2.4,6-thiatriazine O Wild Oats (Avula falua) \V Watcrgrall (Echinochlaq crusgulli) C Crabgrasn (Digilan'a :angulnalis!) M Mustard (Brassica. arvcnsis) A P Pigwecd (Amuranlhux relrnflexus) L Lambsquarler (Chenawdium album) well as broadleaved weeds. Some may be selective with respect to type of application and/or type of weed.

Preand post-emergence herbicidal tests on representative thiatriazines of this invention were made using the following methods:

PRE-EMERGENCE TEST An acetone solution of the test thiatriazine was prepared by mixing 750 mg. thiatriazine, 220 mg. ofa nonionic surfactant and 25 ml. of acetone. This solution was added to approximately 125 ml. of water containing 156 mg. of surfactant.

Seeds of the test vegetation were planted in a pot of 7 PosT-EMEaoEuCE TEsr The test thiatriazine was formulated in the same man ner as described above for the pre-emergence test. The concentration to the thiatriazine in this formulation The amount of thiatriazine administered will vary with the particular plant part or plant growth medium which is to be contacted, the general location of application, i.e., sheltered areas such as greenhouses as compared to exposed areas such as fields, as well as the desired type of control. For pre-emergent control of most plants dosages in the range of about 0.5 to 20 lbs. per acre will be used. Suchadministration will give a concentration of about 2 to 80 ppm. thiatriazine distributed throughout 0.1 acre-foot. For post-emergence application, such as foliar spray application, compositions containing about 0.5 to 8 lbs. thiatriazine per gal. spray will be used. Such application is equivalent to about 0.5 to 20 lbs. thiatriazine per acre.

The herbicidal compositions of this invention comprise a herbicidal amount of one or more of the above described thaitrazines intimately admixed with a biologically inert carrier. The carrier may be a liquid diluent such as water or acetone or a solid. The solid may be in the form of dust powder or granules. These compositions will also usually contain adjuvants such as a wetting or dispersing agent to facilitate their penetration into the plant growth media or plant tissue and generally enhance their effectiveness. These compositions may also contain other pesticides, stabilizers, conditioners, fillers and the like.

As will be evident to those skilled in the art, various modifications on this invention can be made or followed, in the light of the foregoing disclosure and discussion, without departing from the spirit or scope of the disclosure or from the scope of the following claim- I claim:

1. Compound of the formula wherein R, R and R are individually hydrogen; alkyl or alkenyl of l to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35; cycloalkyl of 3 to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35; phenyl or naphthyl substituted with 0 to halogen atoms of atomic number 9 to 35; nitro groups, alkyl groups of l to 4 carbon atoms, alkoxy groups of l to 4 carbon atoms or O to l trifluoromethyl; or a heterocyclic group selected from 2-pyridyl, 3-lutidyl, 2-pyrrolyl, Z-thienyl, 2- furfuryl, Z-furylvinyl, and 3-tetrahydrofurfuryl.

2. Compound of claim 1 wherein one or two of R, R and R are phenyl substituted with 0 to 5 halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of l to 4 carbon atoms or alkoxy groups of l to 4 carbon atoms or 0 to l trifluoromethyl and the other(s) of R, R and R is hydrogen; alkyl of l to carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to or cycloalkyl of 3 to 10 carbon atoms substituted with O to 4 halogen atoms of atomic number 9 to 35.

3. Compound of claim 1 wherein R and R are individually hydrogen; alkyl or or alkenyl of l to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 or cycloalkyl of 3 to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 and R is phenyl substituted with O to 5 halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of l to 4 carbon atoms, alkoxy groups of l to 4 carbon atoms or O to l trifluoromethyl.

4. Compound of claim 3 wherein R and R are individually hydrogen or alkyl of l to 4 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 or alkenyl of 2 to 4 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35.

5. Compound of claim 3 wherein R is phenyl substi: tuted with 0 to 5 halogen atoms of atomic number 9 to 35, 0 to 2 nitro groups or 0 to 3 alkyl groups of l to 4 carbon atoms or O to 3 alkoxy groups of l to 4 carbon atoms.

6. Compound of claim 1 wherein R is alkyl of l to 4 carbon atoms substituted with 0 to 3 halogen atoms of atomic number 9 to 35, R is hydrogen or alkyl of l to 4 carbon atoms substituted with O to 3 halogen atoms of atomic number 9 to 35 and R is phenyl substituted with 0 to 5 halogen atoms of atomic number 9 to 35, nitro groups. alkyl groups of l to 4 carbon atoms or alkoxy groups of l to 4 carbon atoms.

7. Compound of claim 6 wherein R and R are methyl l to 4 carbon atoms or 0 to 1' alkoxy group of l to 4 carbon atoms.

9. Compound of claim 1 wherein R is alkyl of l to 3 carbon atoms, R is hydrogen or methyl, R is phenyl substituted with 0 to 2 fluorine or chlorine atoms, 0 to 1 methyl group or 0 to 1 methoxy group.

10. Compound of claim 9 wherein R and R are methyl and R is phenyl.

11 Compound of claim 9 wherein R and R are methyl and Rhu 2 is 3-methylphenyl.

12. A method for preparing compounds of the formula wherein R, R and R are individually hydrogen; alkyl or alkenyl of 1 to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35; cycloalkyl of 3 to 10 carbon atoms substituted with 0 to 4 halo-- wherein R, R and R are as defined above, at a temperature of 0 to 40C., and recovering thiatriazine.

13. The method of claim 12 wherein the reaction is conducted in the presence of a base.

14. The method of claim 13 wherein R and R are individually hydrogen, alkyl or alkenyl of l to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 or cycloalkyl of 3 to 10 carbon atoins substituted with 0 to 4 halogen atoms of atomic number 9 to 35 and R is phenyl substituted with 0 to 5 halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of l to 4 carbon atoms, alkoxy groups of l to 4 carbon atoms or 0 to l trifluoromethyl.

15. The method of claim 14 wherein R and R. are individually hydrogen or alkyl of l to 4 carbon atoms substituted with O to 4 halogen atoms of atomic number 9 to 35 or alkenyl of 2 to 4 carbon atoms substituted with O to 4 halogen atoms of atomic number 9 to 35.

16. The method of claim 13 wherein R is alkyl of l to 4 carbon atoms, R is hydrogen or alkyl of l to 4 carbon atoms and R is phenyl substituted with 0 to 2 halogen atoms of atomic number 9 to 35, 0 to 1 alkyl group of l to 4 carbon atoms or O to 1 alkoxy group of l to 4 carbon atoms.

17. The method of claim 13 wherein R is alkyl of 1 to 3 carbon atoms, R is hydrogen or methyl, R is phenyl substituted with 0 to 2 fluorine or chlorine atoms, 0 to 1 methyl group or 0 to l methoxy group, and the base is a tertiary amine.

18. The method of claim 17 wherein R and R are methyl and R is 2-fluorophenyl. 

2. Compound of claim 1 wherein one or two of R, R1 and R2 are phenyl substituted with 0 to 5 halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of 1 to 4 carbon atoms or alkoxy groups of 1 to 4 carbon atoms or 0 to 1 trifluoromethyl and the other(s) of R, R1 and R2 is hydrogen; alkyl of 1 to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 or cycloalkyl of 3 to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to
 35. 3. Compound of claim 1 wherein R and R1 are individually hydrogen; alkyl or or alkenyl of 1 to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 or cycloalkyl of 3 to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 and R2 is phenyl substituted with 0 to 5 halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of 1 to 4 carbon atoms, alkoxy groups of 1 to 4 carbon atoms or 0 to 1 trifluoromethyl.
 4. Compound of claim 3 wherein R and R1 are individually hydrogen or alkyl of 1 to 4 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 or alkenyl of 2 to 4 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to
 35. 5. Compound of claim 3 wherein R2 is phenyl substituted with 0 to 5 halogen atoms of atomic number 9 to 35, 0 to 2 nitro groups or 0 to 3 alkyl groups of 1 to 4 carbon atoms or 0 to 3 alkoxy groups of 1 to 4 carbon atoms.
 6. Compound of claim 1 wherein R is alkyl of 1 to 4 carbon atoms substituted with 0 to 3 halogen atoms of atomic number 9 to 35, R1 is hydrogen or alkyl of 1 to 4 carbon atoms substituted with 0 to 3 halogen atoms of atomic number 9 to 35 and R2 is phenyl substituted with 0 to 5 halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of 1 to 4 carbon atoms or alkoxy groups of 1 to 4 carbon atoms.
 7. Compound of claim 6 wherein R and R1 are methyl and R2 is 2-fluorophenyl.
 8. Compound of claim 1 wherein R is alkyl of 1 to 4 carbon atoms, R1 is hydrogen or alkyl of 1 to 4 carbon atoms and R2 is phenyl substituted with 0 to 2 halogen atoms of atomic number 9 to 35, 0 to 1 alkyl group of 1 to 4 carbon atoms or 0 to 1 alkoxy group of 1 to 4 carbon atoms.
 9. Compound of claim 1 wherein R is alkyl of 1 to 3 carbon atoms, R1 is hydrogen or methyl, R2 is phenyl substituted with 0 to 2 fluorine or chlorine atoms, 0 to 1 methyl group or 0 to 1 methoxy group.
 10. Compound of claim 9 wherein R and R1 are methyl and R2 is phenyl.
 11. Compound of claim 9 wherein R and R1 are methyl and Rhu 2 is 3-methylphenyl.
 12. A method for preparing compounds of the formula
 13. The method of claim 12 wherein the reaction is conducted in the presence of a base.
 14. The method of claim 13 wherein R and R1 are individually hydrogen, alkyl or alkenyl of 1 to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 or cycloalkyl of 3 to 10 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 and R2 is phenyl substituted with 0 to 5 halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of 1 to 4 carbon atoms, alkoxy groups of 1 to 4 carbon atoms or 0 to 1 trifluoromethyl.
 15. The method of claim 14 wherein R and R1 are individually hydrogen or alkyl of 1 to 4 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to 35 or alkenyl of 2 to 4 carbon atoms substituted with 0 to 4 halogen atoms of atomic number 9 to
 35. 16. The method of claim 13 wherein R is alkyl of 1 to 4 carbon atoms, R1 is hydrogen or alkyl of 1 to 4 carbon atoms and R2 is phenyl substituted with 0 to 2 halogen atoms of atomic number 9 to 35, 0 to 1 alkyl group of 1 to 4 carbon atoms or 0 to 1 alkoxy group of 1 to 4 carbon atoms.
 17. The method of claim 13 wherein R is alkyl of 1 to 3 carbon atoms, R1 is hydrogen or methyl, R2 is phenyl substituted with 0 to 2 fluorine or chlorine atoms, 0 to 1 methyl group or 0 to 1 methoxy group, and the base is a tertiary amine.
 18. The method of claim 17 wherein R and R1 are methyl and R2 is 2-fluorophenyl. 